What were the key differences between the Nexus and Global Entry programs in 2017, and how did they impact travelers' experiences at the border?

In 2017, the key differences between the Nexus and Global Entry programs were that Nexus was specific to the US-Canada border while Global Entry was for international travel. Nexus allowed for expedited entry into both countries, while Global Entry was focused on US entry only. These differences impacted travelers by providing faster processing and shorter wait times at the border, making their overall border crossing experience more efficient and convenient.